Abstract: The invention provides a system for characterizing an effluent sample from a patient undergoing peritoneal dialysis. The system features a container for enclosing the effluent sample, and optical system, an electrical system, and a processor. The optical system features a light source and a photodetector, the light source emitting a beam of radiation that passes through the container and irradiates the effluent sample, and the photodetector detecting the radiation after it irradiates the effluent sample to generate an optical signal. The electrical system typically features a first pair of electrodes and a second pair electrodes, both attached directly to the container and arranged to measure a capacitance of the effluent sample to generate a capacitance signal. The processor operates an algorithm that collectively processes the optical and capacitance signals to characterize the effluent sample.

Abstract: The invention provides a system for characterizing a patient including a substrate, a first electrode, a second electrode, and an electrical system. The electrical system is connected to the substrate and worn entirely on the patient's body. The electrical system in electrical contact with both the first and second electrodes and configured to inject an alternating electrical current through the first electrode and into the region of tissue. The electrical system is configured to measure a first electrical signal from the region of tissue through the second electrode. The electrical system is configured to measure a second electrical signal from the region of tissue. The first electrical signal or a signal determined therefrom indicates a resistance of the region of tissue and the second electrical signal or a signal determined therefrom indicates a reactance of the region of tissue.

Abstract: Disclosed herein are systems, devices, and methods for measuring blood flow.